Socket Programming

mshankayi · by **mshankayi** » Sat Mar 19, 2011 8:31 pm

@qamerfarooq : can you send the entire projects ? because i can not run it properly because it has been encountered error in my device

akhwaja · by **akhwaja** » Fri Apr 08, 2011 8:43 am

can you please guide me how to connect to server socket[in c#] from an android app[client socket].. I have used the following code for client app in android. I have server app built in C# plus i have client app in C# as well.. the client app created in C# successfully connected with the server app but the client app for android gives Socket timeout exception when it tries to connect.. please help what should i do.. my pc is on network and server app is running over tht and my android phone is running over wifi… is tht what causing problem… waiting for your reply

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

private void connectSocket()
{
// TODO Auto-generated method stub
try
{
//InetAddress serverAddr = InetAddress.getByName(SERVERIP);
InetSocketAddress remoteAddr = new InetSocketAddress(SERVERIP, 8221);
Log.d(“TCP”, “C: Connecting…”);
//Socket socket = new Socket(serverAddr, 8221);
Socket socket = new Socket();
socket.connect(remoteAddr,0);
String message = “Hello from Client android emulator”;
try
{
Log.d(“TCP”, “C: Sending: ‘” + message + “‘”);
PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
out.println(message);
Log.d(“TCP”, “C: Sent.”);
Log.d(“TCP”, “C: Done.”);
}
catch (Exception e)
{
Log.e(“TCP”, “S: Error”, e);
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
finally
{
socket.close();
}
}
catch (UnknownHostException e)
{
// TODO Auto-generated catch block
Log.e(“TCP”, “C: UnknownHostException”, e);
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
Log.e(“TCP”, “C: IOException”, e);
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

mkl · by **mkl** » Wed Apr 04, 2012 4:59 pm

Well I got some problems...

I sould send a TCP message to a busineslogic which detect the message and react. So for example if i send the message "request_complete_list" the busineslogic will send me some informations back! I´m working on Windows 7 with the Eclipse + Android SDK. The businesslogic running on Linux.

The other workers worked with some QStrings and used the method .toAscii() because the allowance which i got is to send all messages as Ascii.

They used a command like this:

Code: Select all: Socket->write(QString(QString("request_complete_list").toAscii()+"\x04").toAscii());

I´m sending the message like this:

Code: Select all: PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStream Writer(s.getOutputStream())),true); String test = "request_complete_list\\x04"; out.println(test);

The problem is the busineslogic just react if the string is correct. So if I´m sending a wrong message i can´t see the problem...

Maybe some of you know how i can solve the problem?! I think it could be because the message i send with out.println(test) is a String in Unicode? and not in Ascii...

I also tried some workaround:

Code: Select all: ByteBuffer buffer1 = ByteBuffer.allocate(100); for(int i = 0; i < test.length(); ++i) { char c = test.charAt(i); int j = (int) c; buffer1.putInt(j); } out.println(buffer1.array());

But no result...

So please if some of you have any idea just post it...

Socket Programming

Re: Socket Programming

Re: Socket Programming

Re: Socket Programming

Who is online